US 11,719,875 B2
Light source module
Chin-Ku Liu, Miao-Li County (TW); Chung-Hao Wu, Miao-Li County (TW); and Hsin-Hung Lee, Miao-Li County (TW)
Assigned to CHAMP VISION DISPLAY INC., Miao-Li County (TW)
Filed by CHAMP VISION DISPLAY INC., Miaoli County (TW)
Filed on Jul. 28, 2021, as Appl. No. 17/386,556.
Claims priority of application No. 109133001 (TW), filed on Sep. 24, 2020.
Prior Publication US 2022/0091322 A1, Mar. 24, 2022
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0043 (2013.01) [G02B 6/0068 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A light source module, comprising:
a light guide plate having a first light incident surface and a bottom surface connected to the first light incident surface;
a first light source disposed on a side of a first light incident surface of the light guide plate; and
a plurality of first optical microstructures disposed on the bottom surface of the light guide plate, wherein the first optical microstructures each have a first light receiving surface, and the first light receiving surfaces are disposed facing the first light source, wherein the first light receiving surfaces of a first part of the first optical microstructures each have a first edge straight line at a junction with the bottom surface, and a perpendicular bisector of each of the first edge straight lines of the first part of the first optical microstructures passes through the first light source, the first part of the first optical microstructures forms a first pattern, a second part of the first optical microstructures forms a second pattern, the first pattern and the second pattern partially overlap each other, and the first pattern and the second pattern are patterns of an object at different view angles.